<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
  .container{
    width:800px;
    height:800px;
    background-color:red;
    position: relative;
  }
  .box{
    width:500px;
    height:500px;
    background-color:#0f0;
    position: absolute;
    right:0px;
    bottom:0px;
  }
  img{
    width:100px;
  }
  strong{
    position:absolute;
    left:0px;
    bottom:0px;
  }
  </style>
</head>
<body>
 <div class="container">


  <div class="box">
    <sapn>我是span元素</sapn>
    <strong>我是strong元素</strong>
    <img src="../images/muxing.jpg" alt="">
    <div>我是div元素</div>
  </div>
 </div>
</body>
</html>